Release spear



W. J. MILLER RELEASE SPEAR Jan. 13, 1931.

Fild May 13, 1930 M/ 4L. m

Patented Jan. 1931 y VRELEASE srEA'nf .l y application ledMay 13,

This invention relates to a release spear" and it is an' object of theinvention to provide adevice of this kind constructed in amanner wherebya packer may be readily applied :and

wherein the structure is Asuch to vassure suf- .icient tension'againstthe'packer'tohold the sam'e:(irm.lhj jwY Y.

f It is also 'an'obj ect of the invention to provvide a spear ofthiskindv with a packer assoi 1g ciated therewith, thevassemblybeingpsuchtocause the -packer to expand under pulling strain on the spear tof-add anupward kick to lthe fish vand wherein the packer, upon lowering of the'spear, goes back to normal Y to allowl free circulation between 'thespear and pipe to speed 'up'thepump .Y

An additionalv lobject of the'invention is to provide a spear ofthiskind which will pull the 'fish with the pump pressure.V 2o'. Theinvention consists in the details of construction and lin thecombination and arrangement of the several parts Vof my improvedautomatic release -spear whereby certain important advantages areattained and the device. rendered'simpler, less expensive and otherwisemorev convenient and advantageous for use, aswill ybe hereinafter moreVfully set forth.' y

The novel features of my invention'will so hereinafter bedeflnitelyclaimed. n'

VIn order that my invention may be the better understood, I. will nowproceed `to describe the same with reference to ,the accompanyingdrawings, -wherein L Figure l is aview partly in section and.

partly in elevation illustrating a spear constructed in accordance withan embodiment of my invention, theassociated casing being ofragmentarily shownin section and the'shank under pulling strain;

Figure 2Ais a fragmentary sectional view of the'lower portion of thespear with the parts innormal position; A n

Figure Sis an enlarged sectional view takensubstantially onthe line ofFigurel; v

Figure eis a sectional Yview taken substantially on the line of Figure3; f. Figure 5 is a sectional viewsimilar to Fig- 'shoulder' 9 disposedl circumferentially 1930. semi 119.452,095.-

of fmy invention. 4 4

, Asfdisclose'd in they accompanying drawings, 'l denotes the lowerportion of a drill ure'` a further embodiment i stem which has 'threadedtherein the upper 55 portion of,V an elongated tubulargvshank 2.Threaded. or l otherwise engaged with the lower portion ofthe v`shank.2V is a tool 3, hereindisclosed, as constituting `aguide member orreamer. lTheyupprer or Vinner 'portion ofv 60 the l guide memberv orreamer' has-its wallV ymaterially reduced-` from without :ink diameter,asat 4, the bottom annular wall or shoul der ixresulting fromt .suchreduced portion;

being inwardly'and downwardly inclined.

j VSurrounding the' portion '4f of @the guide member or r'eamer 3 isapackerzjhaving its i lower edge face beveled to have snug or lclosecontact with thebeveled or inclined shoulder -5, while'V theA oppositeendf face ofthe 70 s packer 6 islbeveledk for close contact withthebeveled edge/face of the, ring member 7 surroundingthefportion .4. v'Theupper or inner end ofthis ring member v7 is dened by an inwardlydisposed flangeS overlying the 75 Y inner 'or-1, upper end'of theapplied'guide membervlor reamer 3.; NormallyV thefpacker isfullyexpanded with its outer or peripheral face substantially flush with theouter i face of vthe guide member or reamer -3 and with theflangeS ,ofthe ringrmember 7 spaced upwardly from the guide member yorream'ervlan'd preferablyin contact withthe aroundthe shank`2 and Awhichlshoulder is, `inthe presentembodimentof ,myjinventiom Y obtainedbygre'ducingth'e lowergend portion Yof said shank-2 .for.- a; desireddistance lengthwise'thereof.

member-17 ,and having ,"contactjwith said Vmember 7 fromabofvefis.-a'tapered mandrel 10..; The mandrel 1.110 is freely "mounted on the'.shank 2 andgsaidzmandrel coacts from l within with the elongatedgrippingarms 11 carriedcybysthe lower'sectlon -12 o fra slip fsleeve S. Y f Thislower section 12 is'inthread'- ed engagement,as at 14, with the` uppervsec- .tion 1510i the sleeve S. vBy providing the separate sections12'a'nd 15 the lower sec-` Surroundingthe shank2 yabove.'the ring e0 Ylon tion 12 together With the gripping arms 11 can be -readily replacedWhen desired.v

The section 12 can be readily removed after taking ofi" the guide memberor reamer Y 3, the packer 6, the ring member 7 and the mandrel 10. Uponremoval of the guide member or reamer 3 thepacker 6 maybereplaced:asfrequire'd. i Q- Atthis timeit is to be statedv that the v'paeller 6preferably constitutes fabric reinforced'V rubber althoughOthrigifblejlbglilimyi be employed which will assure the requisiteoutward expansion of the packerfuln-n der the lifting pull or strainimposed upon the guide member or reamer 3.1" Y f The upper section 15ofthesleeve Sat dia'n'netricallyl opp'osed"points` is Yprovided With theelongatedslots 16,.'thelovverfportion @of each of lwvhi'ch'jbeingltransversely'endel-"18 substantially straight from end to larged, iasat' 17,to,providea n upper shoulend. Thegloiver edge Wall ofthe enlarged'portion'17o the slot remote romthe'shoulder 18 is disposed downwardlyon an incline, as at 19, toward the` opposed edge Wall.

"Tightlyengaged'withthe shank 2 is a key V2001? desiredvdimensionsandnof alength to project beyond opposite sides. of `the f shank witheach'extended vend* portion being received. Withinva/slotfl. and itsyenlarged portion" 17. 4 The bore of thelshank 2l adjacent to theVkey1v20v is enlarged, 'as at 21, to.- allow Water passage `'around the'appliedjkey`20. 'The .inclined edgewalls 19are for the purpose ofautomaticallyhplacing each extended portion ofthe keyj20`d`irectlyunder, ashoulder -1Sy Whenthe ,shrank 2 is vlowered tov permittheannular' shoulder 2 2 off-the shank 21ste contact Withthe .upper endvofthe mandrel to `jar said arm-11..

'rlhisshoulder122 surrounds the shank 2 at a desired pointthereonVYbelovv the-key 20.

mandrel'H from .the gripping `This`shoulder 22`is alsoprovided byreducing in diameter thezshou'lder 2. l

Y -lithftlie spear .underpulling 'strain' the packerjS expands againstthe inner'vvall of the `.pipe "P and the ring member 7 movesdoivnvvardlyuntil thewinterivial flange ,8, there-l of vcontacts withthe;` upper 'Y or, innerend of the, 'gudefmembr or? reamer.. ith'f'the ipacker 6 soegpanded thepumpifcanbe used for circulation aroundthegishand thus, help liftthe fish With'hydraulicjapressure( By lQWering the.'Spear .the packer 6 ,will return Vto nominal and L allov'vQ `freecirculation' between the Spear andppe 'ofish P seas to :speed andere@pulled' iqu-cklyin iztheypnlling "strain, fthe .sudden packing pif will'i uid-v an nel@ .embodiments my 'invention Las' i11- long, ,one endaeeof, the packerf.having snug or close contact'ivith the shoulder 5 ofthemember or reamer y3 While the opposite With the ring member 7 in thesame manner fandatashion as previously described with respect to thepacker 6.

romm'the'*foregoing description it is thought to be obvious that, anautomatic release l Spear Constructed/in accordance with my invention islparticularly ,Well .adapted for ,use ibyfreason Aoit' the convenience,and facility with which itmaybe assembled'and operated, and it will 1alsobe obvious .thatmy invention is'suscep'tible of some changeandmodication Without departing `fromV Ythe principles ,and spirit kthereofand orthis reason I do not Wish to ,bezunderstood as limin Qarrying,outlmy invention. in'practice ex- 'cept as hereinafter claimed.

j I claim 'l 1. A release spear. of 'the class described' `comprising an'elo ngatedshank, a kmember engaged with 'theinserting end portion-ofthe shank, the yWall oflsaid'member,beingreduced from Withoutprovidingfalovver,shoul- 4kiting ymyself totheprecise arrangement and Ivformation off the several parts, herein shown der, eXpansible packingsurrounding said reduced portion of the imember, "a ring mem-A bersurrounding, said reduced 'portion of l the .first named member-,abovethe packingga mandreljfreely.4 mounted ,upon the shank, for

limiting the f movement of the ring member in a 'direction away fromvthe virstnamed lmember, and a slip,sleevesurroundingthe shan'k'an'dhaving enpansible pipegengaging means, the rmandrelfcoactingWithisaidrexf pansiblepipeengagingmeans." Y v A. .Y 2. rAv'release spear'ofthe class described comprising' an Aelongated shank, a' memberengaged Withlthe insertingrend portion of the r shank, vthe Wall. ofsaid member beingreduced from without providing a lovverfs'ho'udlen-anleX-panslble packing-surrounding 'saldi reduced "portion-,of the member,a ring'. member 'surrounding said reduced .fportionz or'- thei-rst namedmember above thepacking-a mandrel freely -mounted upomthe-shankfoncoaction -.-WithV the ,f ring f member, meansfor f limiting the movementof thel ringnmembergingadierection: .away l"from, :the yiirst named ymember, and aslipfleeve surroundngifthehank and having expansible pipeengaging means,.the mandrel coacting IWith. said ex yansible l.pipeengagingffrneansfsaid'ring mem er havingan inwardlyV disposed flangeJ)for 1 coa-ction :with

the adjacentend ofthe first named member p for limiting the movement ofthe ring memof the rst named member above the packing, a mandrel mountedupon the shank for co-` action with the ring member, means Jfor limitingthe movement of the ring member in a directiony away from theiirstrnamed member, and a slip sleeve surrounding the shank and havingexpansible pipe engaging means, the mandrel coacting withsaid eX-pansible pipe engaging means, the shoulder of the first named memberbeing inwardly and downwardly inclined, thel adjacent end of the packinghaving close contact atall times with such shoulder.

4. A release spear of the class described comprising an elongated shank,a member engaged with the inserting end portion'of the shank, the wallof said member being reduced from without providing a lower shoulder, anexpansible packing surrounding said reduced portion of the member, aring member surrounding said reduced portion of the first named memberabove the packing, a mandrel freely mounted upon the shank for eoaetioni with the ring member, said shank being pro- Vvidedtherearound with ashoulder for contact by the ring member for limiting the movement of thering member away from the rst named member.

5. A release spear of the class described comprising an elongated shank,a member engaged with the inserting end portion of the s ank the wall ofsaid member being reduced from without providing a lower shoulder, asleeve havingone end portionA engaged with said reduced portionV of themember, an expansible pack-er surroundingl the sleeve, a ring membersurronnding'the sleeve above the packer, a mandrel freely mounted uponthe shank for coaction with the ring member, means for limiting' thesleeve, a ring member surroundingthe sleeve above the packer, a mandrelmounted upon,V the shank for coaetion with thering member, means forlimiting the movement of the ring member in a direction away from thefirst named member,and a' slip sleeve surrounding the shank and havingexpansible pipe engagf ing means, the mandrel coacting with said eX-pansible pipe engaging means, an end porl tion of the sleeve having arabbet tightly receiving the reduced portion of the member.

7. A release spear comprising an elongated shank, expansible pipeengagingl means carried by the shank,anactuatingrmember for, expandingsuch means upon pull on theV shank, and an expansible packing mountedupon the shank below the actuating member,

said actuating memberupon pull of the shank y.

expanding the packing.

In testimony whereof I hereunto afIiX my` signature. l

WILLIAM J. MILLER. l f

movement of the ring member in a direction Y away from the first namedmember, and a slipsleeve surrounding the shank and having eXpansiblepipe engaging means, the mandrel coacting with said expansible pipeengaging means.

6. A release spear .of the class described comprising an elongatedshank, a member engaged with the inserting end portion of the shank, thewall of said member being reduced from without providing a lowershoulder, a sleeve having one end portion engaged with said reducedportion of the memv ber, an expansible packer surrounding the

